These are A commander who is a legendary creature A deck with a total of a 100 cards (including commander) Anything not on the commander ban list As long as you abide by these 3 rules, then you should be fine no matter who you play with
No death triggers, recursion, or Ill just bring it back next turn. Six mana is a lot, but the control you get in return is worth it
Collector Boosters can be purchased individually, as a box of four, or as part of the Gift Bundle
Which means that you either need to find ways to protect the Foundry, throttle the threat of the creature being copied, or simply hope that it can survive removal for at least a round or two
Alternatively, you can buy cards from other players and collectors
The joke here is that the creature of the same name in Final Fantasy XV is incredibly durable and takes hours to beat, but you're rewarded handsomely for taking it down (translated to Magic as Treasure tokens)